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一个体积为12的正三棱柱的三视图如图所示,则这个三棱柱的左视图的面积为( ) A...
一个体积为12的正三棱柱的三视图如图所示,则这个三棱柱的左视图的面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212121702393600/SYS201310232121217023936007_ST/images0.png)
A.6
B.8
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212121702393600/SYS201310232121217023936007_ST/0.png)
D.12
考点分析:
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已知函数f(x)=(x-a)(x-b)(其中a>b)的图象如图所示,则函数g(x)=a
x+b
x的图象是( )
A.
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B.
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C.
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D.
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某校高三年级共1200名学生,现采用分层抽样方法抽取一个容量为200的样本进行健康状况调查,若抽到男生比女生多10人,则该校男生共有( )
A.700
B.660
C.630
D.610
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阅读如图的程序框图.若输入m=4,n=6,则输出的a,i分别等于( )
A.12,2
B.12,3
C.24,2
D.24,3
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已知cos(α-
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)=
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,则sin2α的值为( )
A.
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B.-
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C.-
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D.
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设平面向量
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=(1,2),
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=(-2,y),若
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∥
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,则|3
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+
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A.
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B.
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C.
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D.
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